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    So it's Christmas Time!! Get ready to build an Easy yet AMAZING mini-project. You can minimize the whole thing to a PCB board and hang it on your Christmas Tree.


    We will be using an SSD1306 OLED for the display of the message - "Merry Christmas" with a basic animation of snowflakes. To do that, let us go through the basics of How to use the OLED screen first.

    There are 2 types of Communication used for different OLED displays - SPI and I2C.

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    SPI based SSD1306

    A 7-pin OLED module offers all interfacing options like 3-wire SPI, 4-wire SPI, and I2C. The default 4-wire SPI is the fastest communication mode with the OLED. It has the following pin configuration -


    For interfacing, the module with Arduino connects the GND and VCC/VDD pins to the ground and 5V out of the Arduino, respectively. The D0, D1, RST, DC, and CS pins can be connected to any GPIO. A 6-pin module doesn't have Chip Select (CS) pin.